问题
选择题
The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
A．force
B．energy
C．power
D．strength
答案
答案：A
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The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
A．force
B．energy
C．power
D．strength
答案：A